This is especially true on a NA motor. I put a 2.5” on my B16 and it lost low end power. Put a 2.25 in resonator in the middle and got the most uniform power band. Funny thing was, I was much younger then, the guy at the muffler shop warned me that I was going to lose power but I wanted big!
@Heeltoe.7 ай бұрын
NA is such a special animal. There is absolutely a right way to do it and believe it or not sometimes the best way to know is by trial and error, AKA "Testing." A build B16A with big cams may have liked the 2.5" but probably only at top end.
@1stGenCRXs7 ай бұрын
@@Heeltoe. so true! That’s one great thing about the internet and forums now days. When I put the K24 in there was no question I was putting a 3in system in. So much data available on the web about what works. Back then it just didn’t exist like it does today. Others have done and shared the testing.
@subynut7 ай бұрын
Really appreciate the down to earth explanation. It allows me to apply this same theory to my Subarus as well!
@Heeltoe.7 ай бұрын
It's good information to have.
@McLovin08267 ай бұрын
Love these videos, your transparency is second to none
@Heeltoe.6 ай бұрын
I appreciate that!
@joeholt75787 ай бұрын
The late 80' SLP did a single exhaust for the Firehawk and it was worth 15 hp more. But they couldn't give it away because everyone thought duals were better looking.
@Heeltoe.7 ай бұрын
A car like that 100% is only going to do well with dual outlets. Even the camaro and firebird in the 90s and 00s had a single exhaust to a transvers muffler with dual outlets in the back. Fastest way for a carmaker to make a car boring is to hide exhaust, and best way to make it sporty is to put dual outlets.
@PiterStreak7 ай бұрын
Solid topic marcus. I have to agree bigger isnt always better. I have pushed your 3" ATLP on the 3rd gen TL to 620whp without issues. The best sounding exhaust for that platform in my opinion. Unfortunately i made the mistake of going custom to squeeze as much out of the system and sound wise its no where near as good as the ATLP. A buddy of mine went from a 2.5inch tsudo to a custom 3 inch single exit. This was done because everyone and their mom in the 3rd gen tl community says single exit 3 inch is better measured by the butt dyno. Well, my buddy, who is also supercharged made 0 horsepower extra after going single exit from his tsudo. Made 506whp with the tsudo and made 506whp again with the single exit. Bigger isnt alwas better.
@Heeltoe.7 ай бұрын
Interesting about your buddy. On a 3g we definitely see a bump going from 2.5 to 3.0. Maybe there is more to the story on either side. Anyway, hard to say the same results will be there for all people. It's called TUNING!
@djsthemetereman7 ай бұрын
Yes functionwerk sounds deep & aggressive plus paired with high Flow cats it sounds terrific but I also like the way ATLP sounds as well. IMR America has one but they use resonators & not mufflers so it's an even different sound, so great subject
@Heeltoe.7 ай бұрын
We'll find out how they compare directly in an upcoming video. IMR didn't incorporate the active valve.
@djsthemetereman7 ай бұрын
@@Heeltoe. That's true with IMR exhaust but yeah it would be great if someone would compare all 3 exhausts
@jasonsharp49517 ай бұрын
I recently bought a 2008 TL type s. Was wanting to get an ATLP exhaust. I was interested in the 3” setup. Plan on getting a 3.7 intake and TB and probably a few other things with a tune. My question is do you think I should go for the 3” or 2.5” setup. I am wanting to stay NA
@Heeltoe.7 ай бұрын
If you are going to be doing those air/fuel upgrades and tuning and want the most peak power then it can make sense to do the 3". For more balanced gain and the resonator option to keep the interior sound lower, go 2.5"